Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 32-43
Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 44-60
Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 61-65
Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 1, pages 66
Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 67-97
Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 97-115
Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 115-121
Published in Journal of The Arnold Arboretum, in 1919, in volume 1, issue 2, pages 121-146